Question
A two-digit number has digits summing to 11. Reversing the digits increases the number by 27. What is the original number?
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Correct Answer: D. 47
Explanation:
Let tens digit be a and units digit b; then a + b = 11 and 9(b - a) = 27.
So b - a = 3, giving a = 4 and b = 7.
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